• David Fries's avatar
    w1: optional bundling of netlink kernel replies · 8a0427d1
    David Fries authored
    Applications can submit a set of commands in one packet to the kernel,
    and in some cases it is required such as reading the temperature
    sensor results.  This adds an option W1_CN_BUNDLE to the flags of
    cn_msg to request the kernel to reply in one packet for efficiency.
    The cn_msg flags now check for unknown flag values and return an error
    if one is seen.  See "Proper handling of unknown flags in system
    calls" http://lwn.net/Articles/588444/
    This corrects the ack values returned as per the protocol standard,
    namely the original ack for status messages and seq + 1 for all others
    such as the data returned from a read.
    Some of the common variable names have been standardized as follows.
    struct cn_msg *cn
    struct w1_netlink_msg *msg
    struct w1_netlink_cmd *cmd
    struct w1_master *dev
    When an argument and a function scope variable would collide, add req_
    to the argument.
    Signed-off-by: default avatarDavid Fries <David@Fries.net>
    Acked-by: default avatarEvgeniy Polyakov <zbr@ioremap.net>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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